mirror of
https://gitea.wildfiregames.com/0ad/0ad
synced 2026-06-16 13:23:56 -07:00
157c6af18e
Avoid cases of filenames Update years in terms and other legal(ish) documents Don't update years in license headers, since change is not meaningful Will add linter rule in seperate commit Happy recompiling everyone! Original Patch By: Nescio Comment By: Gallaecio Differential Revision: D2620 This was SVN commit r27786.
157 lines
4.5 KiB
C++
157 lines
4.5 KiB
C++
/* Copyright (C) 2021 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef INCLUDED_SCRIPTCONVERSIONS
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#define INCLUDED_SCRIPTCONVERSIONS
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#include "ScriptRequest.h"
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#include "ScriptExceptions.h"
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#include "ScriptExtraHeaders.h" // for typed arrays
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#include <limits>
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#include <vector>
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namespace Script
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{
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/**
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* Convert a JS::Value to a C++ type. (This might trigger GC.)
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*/
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template<typename T> bool FromJSVal(const ScriptRequest& rq, const JS::HandleValue val, T& ret);
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/**
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* Convert a C++ type to a JS::Value. (This might trigger GC. The return
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* value must be rooted if you don't want it to be collected.)
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* NOTE: We are passing the JS::Value by reference instead of returning it by value.
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* The reason is a memory corruption problem that appears to be caused by a bug in Visual Studio.
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* Details here: http://www.wildfiregames.com/forum/index.php?showtopic=17289&p=285921
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*/
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template<typename T> void ToJSVal(const ScriptRequest& rq, JS::MutableHandleValue ret, T const& val);
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template<>
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inline void ToJSVal<JS::PersistentRootedValue>(const ScriptRequest& UNUSED(rq), JS::MutableHandleValue handle, const JS::PersistentRootedValue& a)
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{
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handle.set(a);
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}
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template<>
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inline void ToJSVal<JS::Heap<JS::Value> >(const ScriptRequest& UNUSED(rq), JS::MutableHandleValue handle, const JS::Heap<JS::Value>& a)
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{
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handle.set(a);
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}
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template<>
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inline void ToJSVal<JS::RootedValue>(const ScriptRequest& UNUSED(rq), JS::MutableHandleValue handle, const JS::RootedValue& a)
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{
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handle.set(a);
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}
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template <>
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inline void ToJSVal<JS::HandleValue>(const ScriptRequest& UNUSED(rq), JS::MutableHandleValue handle, const JS::HandleValue& a)
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{
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handle.set(a);
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}
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/**
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* Convert a named property of an object to a C++ type.
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*/
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template<typename T> inline bool FromJSProperty(const ScriptRequest& rq, const JS::HandleValue val, const char* name, T& ret, bool strict = false)
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{
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if (!val.isObject())
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return false;
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JS::RootedObject obj(rq.cx, &val.toObject());
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bool hasProperty;
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if (!JS_HasProperty(rq.cx, obj, name, &hasProperty) || !hasProperty)
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return false;
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JS::RootedValue value(rq.cx);
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if (!JS_GetProperty(rq.cx, obj, name, &value))
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return false;
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if (strict && value.isNull())
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return false;
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return FromJSVal(rq, value, ret);
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}
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template<typename T> inline void ToJSVal_vector(const ScriptRequest& rq, JS::MutableHandleValue ret, const std::vector<T>& val)
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{
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JS::RootedObject obj(rq.cx, JS::NewArrayObject(rq.cx, 0));
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if (!obj)
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{
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ret.setUndefined();
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return;
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}
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ENSURE(val.size() <= std::numeric_limits<u32>::max());
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for (u32 i = 0; i < val.size(); ++i)
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{
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JS::RootedValue el(rq.cx);
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Script::ToJSVal<T>(rq, &el, val[i]);
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JS_SetElement(rq.cx, obj, i, el);
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}
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ret.setObject(*obj);
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}
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#define FAIL(msg) STMT(ScriptException::Raise(rq, msg); return false)
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template<typename T> inline bool FromJSVal_vector(const ScriptRequest& rq, JS::HandleValue v, std::vector<T>& out)
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{
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JS::RootedObject obj(rq.cx);
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if (!v.isObject())
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FAIL("Argument must be an array");
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bool isArray;
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obj = &v.toObject();
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if ((!JS::IsArrayObject(rq.cx, obj, &isArray) || !isArray) && !JS_IsTypedArrayObject(obj))
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FAIL("Argument must be an array");
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u32 length;
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if (!JS::GetArrayLength(rq.cx, obj, &length))
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FAIL("Failed to get array length");
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out.clear();
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out.reserve(length);
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for (u32 i = 0; i < length; ++i)
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{
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JS::RootedValue el(rq.cx);
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if (!JS_GetElement(rq.cx, obj, i, &el))
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FAIL("Failed to read array element");
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T el2;
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if (!Script::FromJSVal<T>(rq, el, el2))
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return false;
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out.push_back(el2);
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}
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return true;
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}
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#undef FAIL
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#define JSVAL_VECTOR(T) \
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template<> void Script::ToJSVal<std::vector<T> >(const ScriptRequest& rq, JS::MutableHandleValue ret, const std::vector<T>& val) \
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{ \
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ToJSVal_vector(rq, ret, val); \
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} \
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template<> bool Script::FromJSVal<std::vector<T> >(const ScriptRequest& rq, JS::HandleValue v, std::vector<T>& out) \
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{ \
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return FromJSVal_vector(rq, v, out); \
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}
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} // namespace Script
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#endif //INCLUDED_SCRIPTCONVERSIONS
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